Minor earthquake, 3.9 mag was detected near Adak in Alaska

A minor earthquake magnitude 3.9 (ml/mb) strikes 96 km SSE of Adak, Alaska (60 miles) on Wednesday. The epicenter of the earthquake was roughly 33.422 km (21 miles) below the earth’s surface. The 3.9-magnitude earthquake has occurred at 21:21:16 / 9:21 pm (local time epicenter). Event ids that are associated to the earthquake: ak025c9x4avl, us6000rcpy. Id of event: us6000rcpy. Exact location of earthquake, -176.0167° West, 51.0979° North, depth 33.422 km. Exact time and date of event in UTC/GMT: 24/09/25 / 2025-09-24 21:21:16 / September 24, 2025 @ 9:21 pm.

Each year there are an estimated 130,000 minor quakes in the world. In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days four and in the last 365 days five hundred and twenty-seven earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage.

How would you describe the shaking?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 96 km SSE of Adak, Alaska.

Adak Alaska

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Parameter	Value	Description
Magnitude	3.9 mb	The magnitude for the event.
Longitude	-176.0167° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	51.0979° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	33.422 km	Depth of the event in kilometers.
Place	96 km SSE of Adak, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-09-24 21:21:16	Time when the event occurred. UTC/GMT
Updated	2025-09-25 03:54:20	Time when the event was most recently updated. UTC/GMT
Timezone offset		Timezone offset from UTC in minutes at the event epicenter.
Felt	1	The total number of felt reports
CDI	1	The maximum reported intensity for the event.
MMI	1.17	The maximum estimated instrumental intensity for the event.
Alert Level		The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status	reviewed	Indicates whether the event has been reviewed by a human.
Tsunami	0	This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG	234	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	us	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,ak,us,	A comma-separated list of network contributors.
Number of Stations Used	36	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.803	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.73 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	232	The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	mb	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	us6000rcpy	Id of event.
Event Code	6000rcpy	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,ak025c9x4avl,us6000rcpy,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.9 mag was detected near Adak in Alaska

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